Four-Point-Probe

Common Needle Spacings

American

English (Imperial)

Metric

Sometimes expressed as

25 mils

0.025"

0.635mm

 

 

 

0.636mm

1/(5p) cm

30 mils

0.03"

0.762mm

 

 

 

1.000mm

 

40 mils

0.04"

1.016mm

 

50 mils

0.05"

1.27mm

 

62 mils

0.062"

1.575mm

 

62.6 mils

0.0626"

1.59mm

 

 

 

1.591mm

1/(2p) cm

 

 

Common Needle Radii

American

English (Imperial)

Metric

1.6 mil

0.0016"

40?/FONT>

2 mil

0.002"

50?/FONT>

4 mil

0.004"

100?/FONT>

8 mil

0.008"

200?/FONT>

10 mil

0.01"

250?/FONT>

20 mil

0.02"

500?/TBODY>



 

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